﻿using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace Raffles.OA.Utility
{
    /// <summary>
    /// MD5加密
    /// </summary>
    public class Md5Helper
    {
        /// <summary>
        /// MD5字符串加密
        /// </summary>
        /// <param name="InputString"></param>
        /// <returns></returns>
        public static string md5(string InputString)
        {
            MD5 md5Hash = MD5.Create();

            // Convert the input string to a byte array and compute the hash.
            byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(InputString));

            // Create a new Stringbuilder to collect the bytes
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 
            // and format each one as a hexadecimal string.
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // Return the hexadecimal string.
            return sBuilder.ToString();
        }


        /// <summary>
        /// MD5文件加密
        /// </summary>
        /// <param name="InputStream"></param>
        /// <returns></returns>
        public static string FileMD5(Stream InputStream)
        {
            MD5 md5Hash = MD5.Create();

            // Convert the input string to a byte array and compute the hash.
            byte[] data = md5Hash.ComputeHash(InputStream);

            // Create a new Stringbuilder to collect the bytes
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 
            // and format each one as a hexadecimal string.
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // Return the hexadecimal string.
            return sBuilder.ToString();
        }
    }
}
